drainage vs flux

drainage

noun
  • A system of drains. 

  • A downward wind. 

  • A natural or artificial means for the removal of fluids from a given area by its draining away. 

flux

noun
  • The act of flowing; a continuous moving on or passing by, as of a flowing stream. 

  • The rate of transfer of energy (or another physical quantity), especially an electric or magnetic field, through a given surface. 

  • A state of ongoing change. 

  • The state of being liquid through heat; fusion. 

  • A chemical agent for cleaning metal prior to soldering or welding. 

verb
  • To flow as a liquid. 

  • To use flux on. 

  • To melt. 

adj
  • Flowing; unstable; inconstant; variable. 

How often have the words drainage and flux occurred in a corpus of books? (source: Google Ngram Viewer )